A # (number) can be used to find variant spellings in cases where one
version of the word has one more character than another version.

Example: colo#r will find both color and colour; and
arch#eology will find both archaeology and archeology.

An ! (exclamation point) character can be used to find variant spellings in
cases where a single character may vary.

Example: wom!n will retrieve both woman and women.

A % (percentage) character, followed by a number, may be placed between two
words to indicate that you want the words to appear within a particular
distance (number of words) from each other, and you don't care what order the
words appear in.

Example: england %3 ballads will retrieve
Ballads of England, Ballads of Merry Olde England and England and Her Ballads.

An ! (exclamation point) character, followed by a number, may be placed between
two words to indicate that you want the words to appear within a particular
distance (number of words) from each other, and in the same order in which you
type the words.

Example: In this case, ballads !3 england
will retrieve Ballads of England and Ballads of Merry Olde England but not
England and Her Ballads.

Boolean operators (and, or, not) may be used for more precise
searching.

Examples: A keyword search for cat not dog will exclude
results that contain the word dog in the record; a keyword search for cat
and dog will include results that contain both the words cat and dog in the
record; and a keyword search for cat or dog will
include results that contain either cat or dog or both in the record.